Ingredients
1/3 cup butter, softened1 cup sugar1 teaspoon vanilla extract3 large egg whites, room temperature2/3 cup all-purpose flour1/2 cup baking cocoa1/2 teaspoon baking powder1/4 teaspoon saltGLAZE:2/3 cup confectioners’ sugar2 tablespoons baking cocoa1/4 teaspoon vanilla extract3 to 4 teaspoons hot water
Preparation
Preheat oven to 350°. Cream butter and sugar until light and fluffy. Beat in vanilla and egg whites, one at a time. In a small bowl, whisk together flour, cocoa, baking powder and salt; gradually add to creamed mixture. Spread into an 8-in. square baking pan coated with cooking spray.
Bake until a toothpick inserted in center comes out clean, 20-25 minutes. Cool completely on a wire rack.
Mix glaze ingredients; spread over brownies. Cut into bars.
